All of my glocks have little serrations on the trigger. I just bought a used one (like new) that has a smooth finish. It isn't a hack sanding job . It looks factory. Is this a replacement non glock trigger?
Thanks

Full size Glocks all have smooth triggers. Subcompact and I think compact Glock have serrated triggers. Glock puts the serrated triggers on them so they can meet importing standers other wise they be illegal. So 99% chance your 17 has the factory trigger.